Tube-expander



Y (Nq Model.)

J. ORORKE.l

TUBE EXPAND'BR.

10.593,77'9. Patented Nov. '16, 1897.

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JOHN OROURKE, OF BROOKLYN, NEW YORK.

TUBE-EXPANDER.

SPECIFICATION forming part of Letters Patent No. 593,779, dated November 16, 1897.

I Application filed May 15, 1897. Serial No. 636,621. (No model.)

To a/ZZ whom t may concern,.-

Be it known that I, JOHN OROURKE, of Brooklyn, in the countyr of Kings and State of New York, have invented anew and useful Improvement in Tube-Expanders, of which the following is a specification.

My invention relates to an improvement in tube-expanders in which provision is made for operating the casing which carries the expanding-rollers by means o f a' ratchetand lever, while the expanding-spindle is under the control of a screw-feed to advance it.

. A practical embodiment of my invention is represented in the accompanying drawings, in whicht Figure l isa view of the expander in side elevatiomthe handle of the ratchet-lever being broken away. Fig. 2 is a view of the same in longitudinal section; and Fig. 3 is an end view looking from the left toward the right, as represented in Figs. l and 2. y

l The casing which carries the expandingrollers is denoted by A. It is made tubular, as is usual, to permit the expanding-spindle B to pass centrally through it. The expanding-rollers O, three in number as here shown, have their journals or trunnions c c the former mounted in radial slots a, at the inner ends of the roller-pockets a in the casing A` ing, the ratchet D to the casing is denoted.

An operating-lever E is bifurcated at its end to receive between the branches e e the ratchet-wheel D, and is f urther provided with a bore e2, extending through the branches e e', for the reception of the reduced portion of the casing A. l

It is intended that the bifurcated end of the lever E shall work in a rotary direction on the casing A with freedom",l but Without any unnecessary play beyond that which is required to permit it a free rotary movement. A spring-actuated pawl F ispivoted between the branches e e of the lever, as at f, the spring f serving to hold its operating end normally in contact with the ratchet-teeth on the wheel D.

A guard G is mounted loosely on the casing A intermediate of the lever E and the larger rear portion of the casing, and is provided with rearWardly-projecting flanges g g', spacedA from the casing A sufficiently to permitthe end of a tube to be expanded to enter between their inner faces and the exterior of the casing and to abut against the front plate (not shown) to hold the expanding-rollers Cin their proper relation to the opening in the .front plate in which the tube is to be expanded.

To the front end of the casing A there is fixeda forwardly-proj ecting exteriorly-screwthreaded sleeve H, the rear end of said sleeve being adapted to receive within it the front end of the casing A and serving to hold the operating-lever E in position on the casing when it (the said sleeve) is fastened in position. The fastening consists in the present instance of one or more set-screws h.

An interiorly-screw-threaded feed-sleeve I is adapted to screw onto the sleeve H, and isv conveniently provided with sockets i for the reception of a Spanner-wrench to turn the sleeve I. The outer end of the sleeve I is provided with an opening t" through it of sufficient diameter to permit the expandingspindle to be inserted centrally within the sleeve H and tubular casing A, and said expanding-spindle Bris caused to move longitudinally along an axial line, together with the feed-sleeve I, by a swivel connection which is made in the present instance by a pair of cap-pieces K K', each provided with a half-socket of such diameter as to loosely fit4 the reduced portions b, h', and b2 of the spindle B. The cap-pieces K Kl may be secured in position to complete the spindle-embracing socket by means of set-screws 7c k',which extend through them into the end of the feedsleeve I. The several'reduced portions-in the present case the three hereinabove referred to denoted byb b bz-are provided for the purpose of adjusting the expandingspindle to different sizes of tubes, thereby materially enlarging the ield of usefulness for the expander while maintaining the movement of the feed-sleeve I within the limits IOO required for expanding a tube of any one given size.

In order to positively determine the extent to which the expanding-spindle B shall be permitted to spread the expanding-rollers and thereby prevent any liability of expanding the tube to a greater or less extent than is most advisable, I provide a stop-nut L on the sleeve H, against which the feed-sleeve will abut when it reaches the limit of its intended movement. The stop-nut L may be adjusted along the sleeve H to give the feedsleeve a greater or less movement, as may be required.

In operation, when the expander has been placed in position, with the end of the tube to be expanded surrounding that portion of the casing where the expanding-rollers are located, the expanding-spindle B is forced rearwardly by turning the sleeve I, and the casing A, carrying the expanding-rollers, is caused to rotate by the reciprocating movement of the operating-lever E. The forcing inwardly of the spindle B and the rotary movement of the casing A will be continued until the sleeve I reaches the limit of its feed movement, determined by the stop-nut L, when the expander may be removed by returning the sleeve I to its forward position, thereby withdrawing the expanding-spindle and permitting the expanding-rollers to co1- lapse.

In case of any failure on the part of the ratchet-lever to operate or in case the position be such that the operation of the expander by the ratchet would be inconvenient or im practicable the expander may still be operated in the manner heretofore common by rotating the expanding-spindle B, holes Z13 being provided in its head for the purpose of inserting an operating-bar. When the expanding-rollers are operated in this manner by the expanding-spindle, the feed may be effected in the same manner as when using the ratchet-lever D.

What I claim isl. A tube-expander comprising a tubular casing carrying the expanding rollers, a ratchet-toothed wheel secured to the casing,

an o eratinv-lever loosel embracinr the casing and carrying a pawl, a screw threaded sleeve secured to the casing in axial alinement therewith, an expanding-spindle and a feed-sleeve sWiveled to the expanding-spindle and engaged with the irst-named sleeve, substantially as set forth.

2. A tube-expander comprising a casing carrying expanding-rollers, means for rotating the casing, a screw-threaded sleeve secured to the casing, a feed-sleeve engaged with the aforesaid sleeve, an expanding-spindle, a swivel connection between the expanding-spindle and feed-sleeve, and an adjustable stop to limit the movement of thc feed-sleeve, substantially as set forth.

3. A tube-expander comprising expanding- :rollers and their support, means for rotating the roller support, an expanding s spindle, means for feeding it into engagement with the rollers and means for connecting the feed device to the expanding-spindle at intervals along the spindle, substantially as set forth.

JOHN OROURKE.

Vitnesses:

FREDK. IlAYNEs, C. S. SUNDGREN. 

